poof

Short definition from Wiktionary

Interjection

1. 1
   Onomatopoeia indicating a small explosion with a cloud of smoke; as caused by a deflating object, or a magical disappearance.

Verb

1. 1
   To vanish or disappear.
2. 2
   To break wind; to fart.

Noun

1. 1
   The product of flatulence, or the sound of breaking wind.
2. 2
   A gay man; especially one who is effeminate.